Like Angus, I also have noticed fewer reports and smaller numbers of
American Golden-Plover in Western New York. I live on Lake Ontario in
Niagara County where most autumns I could see this species without any
special effort. That is, I'm not one to hunt down a species for my year
list, unless I am doing a big year, but I still would find them. A few years
ago, I noticed that newer birders were chasing after reports of this species
for their year list and I assumed that they simply did not understand their
habitat preferences or else they could find their own. However, two years
ago, I did a big year in Niagara County and I had to actively search for
Golden-Plover on two dozen occasions before I finally found a single bird.
Two weeks later, I had two birds for a grand total of three in the county
for the year, a year in which I was exceptionally active. Of course, my
difficulty might simply be attributed to Golden-Plovers having a poor
breeding season but I never had any adults and I was active through the
summer when they would have passed through.

The Buffalo Ornithological Society (BOS) maintains a database of noteworthy
bird sightings in the BOS Region, which includes all of Kingbird Region One
plus the Niagara peninsula of Ontario. I don't have the skills to generate a
graph of high yearly counts from this database but from looking it over, it
seems that high yearly counts have decreased considerably. For example,
there are fewer triple-digit counts in the Niagara peninsula of Ontario
which is the best area in the region to find this species. Western NY would
occasionally get triple-digit counts as well but there have been none since
1997. And even double-digit counts are fewer than before 2000.

This year, I managed to see one Golden-Plover in Niagara County, a bird
found by someone else, and it was on a pier on Lake Ontario, not in a field.
I spent considerable time looking in fields for this species this fall but
found none.

Willie D'Anna
Wilson, NY


Subject: American Golden-Plover - another NYS migrant to worry about?
From: Angus Wilson <oceanwander...@gmail.com>
Date: Wed, 14 Oct 2020 16:18:10 -0400
X-Message-Number: 6

I am glad to see an informed discussion about the apparent decline in
Bonaparte's Gulls both in western and coastal New York State. Birding forms
tend to focus on the positive such as new sightings, influxes, and
weather-related events, with much less attention given to species that might
be disappearing before our eyes. The human brain is not very good at
accessing the absence of something and birding record systems are seemingly
not much better either.

Aside from Bonaparte's Gull, I have wondered about the status of America
Golden-Plover in the state. In the past several years I've noted few if any
reports of larger flocks that would draw birders to sod fields and other
grassy habitats in the fall, especially in eastern Long Island. In recent
years only a scattering of Golden-Plovers have been reported in the fall
(principally from late August to late October), rarely more than two
together. Many people may have successfully ticked their 'year bird' and not
given much more thought to it but the reality is that we probably are all
ticking the SAME few birds.

Looking at the tallies for some of the hotspots for southbound plovers it
was not long ago that flocks of 60-100+ were frequent in and around
Riverhead (Suffolk NY). 2016 seems to have been the last good season (many
reports of 60+), with 2012 and 2013 similarly featuring some larger flocks
(counts of 102, 105, etc). Is something going on? Is the apparent decline in
birds staging on eastern Long Island echoed elsewhere?

American Golden-Plover is an arctic and subarctic tundra nesting species
that makes a long oceanic flight (a minimum of 2,400 miles nonstop) to
wintering grounds in the Pampas and Campos regions of southern South
America. It is possible that weather conditions have allowed birds to launch
from further north and simply bypass our area. Scrutiny of trends in the
Canadian Maritime Provinces and New England or the Mississippi/Missouri/Ohio
flyway (if the southbound route has shifted towards the center of the
continent) might shed light on this. Changes in pesticide use might also
render the Long Island sod fields less attractive such that birds arriving
at night leave soon after.

It's worth noting that aside from a possible shift in the migration route,
many high latitude breeding species undergo cycles of abundance that reflect
cycles in breeding success - these may relate to lemming cycles, late
snowmelt, and so on. It could be we are in the trough of one of these
cycles. Careful monitoring of the relative numbers of juveniles/1st basic
and adults (estimating the ratio from year to year) can give warnings of
these changes. This could also be done fairly easily with Bonaparte's Gulls
because these two age classes are easy to distinguish. Unfortunately,
relatively few birders keep notes on these things and again there's no
simple way that I can find to recover such information from eBird or other
record collections. Maybe folks on this list will have insight into how best
to use the available data in this regard.

All food for thought. Don't get me started on Upland Sandpiper......

--
Angus Wilson
New York City



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